Assistant crash, lost configuration

[koan]

Assistant 4.7.0 crashed while I was using it. Now when I run it, I can only see the help files for Qt tools, I cannot get to any documentation files for the API. It gives a 404 error when I try to click on any link to "Home".

How can I reset the configuration to default and find the documentation for the Qt API etc ?

[TimsonC2000]

Edit -> Preferences -> Documentation -> Add ... look for the qch files in your qt documentation